Just a guess here, but I'm thinking that there may have been a design change that needed more grease capacity or maybe the suspension travel changed that required more room to move?

coupler 2.jpg

1970 Challenger T/A 4-Speed
1970 Challenger T/A 4-Speed
1970 Challenger T/A Auto
1970 Challenger R/T Auto
1970 Challenger Auto
1970 Challenger RT 440+6 4-Speed
1970 Challenger RT 440+6 4-Speed
1970 Hemi Challenger 4-Speed
1970 Hemi Cuda 4-Speed
1971 Cuda Auto
1971 Cuda 4-Speed
LOOKING to BUY 1970 & 1971 E Body J, V and R Code project cars